/* ============================================
   VPNApps.net — Corporate Stylesheet
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  --color-bg-primary: #0a0e1a;
  --color-bg-secondary: #0f1424;
  --color-bg-tertiary: #141a2e;
  --color-bg-card: #161c32;
  --color-bg-card-hover: #1a2139;
  --color-surface: rgba(255, 255, 255, 0.03);
  --color-border: rgba(255, 255, 255, 0.06);
  --color-border-hover: rgba(255, 255, 255, 0.12);
  --color-text-primary: #e8eaf0;
  --color-text-secondary: #8b92a8;
  --color-text-muted: #5a6178;
  --color-accent: #34d399;
  --color-accent-dim: rgba(52, 211, 153, 0.12);
  --color-accent-glow: rgba(52, 211, 153, 0.25);
  --color-white: #ffffff;
  --color-error: #f87171;
  --color-success: #34d399;
  --font-display: 'DM Sans', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.2);
  --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.4), 0 16px 48px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(52, 211, 153, 0.08);
  --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --nav-height: 72px;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

ul, ol {
  list-style: none;
}

button, input, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

::selection {
  background: var(--color-accent-dim);
  color: var(--color-accent);
}

/* --- Utility --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--transition-base), box-shadow var(--transition-base);
  background: transparent;
}

.nav.scrolled {
  background: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

.nav__logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-accent), #059669);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav__logo-icon svg {
  width: 18px;
  height: 18px;
  color: var(--color-bg-primary);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-base);
  letter-spacing: 0.01em;
}

.nav__link:hover,
.nav__link:focus-visible {
  color: var(--color-text-primary);
}

.nav__cta {
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: 100px;
  background: var(--color-accent);
  color: var(--color-bg-primary);
  transition: opacity var(--transition-base), transform var(--transition-base);
  cursor: pointer;
}

.nav__cta:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-secondary);
  border-radius: 2px;
  transition: var(--transition-base);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 60% 60% at 50% 40%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 40%, black 20%, transparent 70%);
}

.hero__glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse, var(--color-accent-glow) 0%, transparent 70%);
  opacity: 0.3;
  filter: blur(80px);
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 780px;
  margin: 0 auto;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 100px;
  background: var(--color-accent-dim);
  border: 1px solid rgba(52, 211, 153, 0.15);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 32px;
  letter-spacing: 0.03em;
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.035em;
  color: var(--color-text-primary);
  margin-bottom: 24px;
}

.hero__title-accent {
  background: linear-gradient(135deg, var(--color-accent), #6ee7b7);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__subtitle {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 580px;
  margin: 0 auto 40px;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: all var(--transition-base);
  letter-spacing: -0.01em;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-bg-primary);
}

.btn--primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(52, 211, 153, 0.25);
}

.btn--secondary {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
}

.btn--secondary:hover {
  border-color: var(--color-border-hover);
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-2px);
}

.btn__arrow {
  transition: transform var(--transition-base);
}

.btn:hover .btn__arrow {
  transform: translateX(3px);
}

/* --- Sections --- */
.section {
  padding: 120px 0;
  position: relative;
}

.section--alt {
  background: var(--color-bg-secondary);
}

.section__header {
  text-align: center;
  margin-bottom: 64px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.section__label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--color-text-primary);
}

.section__desc {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- About --- */
.about__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.about__item {
  padding: 32px 28px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.about__item:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.about__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.about__icon svg {
  width: 22px;
  height: 22px;
  color: var(--color-accent);
}

.about__item-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.about__item-text {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* --- Products --- */
.products__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.product-card {
  position: relative;
  padding: 40px 36px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent-dim), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.product-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

.product-card:hover::before {
  opacity: 1;
}

.product-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 1.5rem;
}

.product-card__icon--monitly {
  background: rgba(59, 130, 246, 0.12);
  color: #60a5fa;
}

.product-card__icon--premier {
  background: rgba(52, 211, 153, 0.12);
  color: #34d399;
}

.product-card__icon--vpnpanel {
  background: rgba(168, 85, 247, 0.12);
  color: #c084fc;
}

.product-card__icon--netguard {
  background: rgba(251, 191, 36, 0.12);
  color: #fbbf24;
}

.product-card__icon svg {
  width: 28px;
  height: 28px;
}

.product-card__name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

.product-card__desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: 8px;
}

.product-card__benefit {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.product-card__benefit svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.product-card__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-primary);
  padding: 10px 22px;
  border-radius: 100px;
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.product-card__link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-dim);
}

.product-card__link svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-base);
}

.product-card__link:hover svg {
  transform: translateX(3px);
}

/* --- Why Section --- */
.why__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
  align-items: center;
}

.why__content {
  max-width: 520px;
}

.why__text {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
}

.why__features {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.why__feature {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.why__feature-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--color-accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.why__feature-icon svg {
  width: 18px;
  height: 18px;
  color: var(--color-accent);
}

.why__feature-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.why__feature-text {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.why__visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.why__graphic {
  width: 100%;
  max-width: 420px;
  aspect-ratio: 1;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  position: relative;
  overflow: hidden;
}

.why__graphic::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, var(--color-accent-dim), transparent 60%);
  pointer-events: none;
}

.why__stat {
  text-align: center;
  position: relative;
  z-index: 1;
}

.why__stat-number {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--color-accent);
  line-height: 1;
}

.why__stat-label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

/* --- Contact --- */
.contact__inner {
  max-width: 640px;
  margin: 0 auto;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form__label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  letter-spacing: 0.02em;
}

.form__label--optional::after {
  content: '  (optional)';
  font-weight: 400;
  color: var(--color-text-muted);
}

.form__input,
.form__textarea {
  padding: 14px 18px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: 0.9375rem;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--color-text-muted);
}

.form__input:focus,
.form__textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-dim);
}

.form__textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.6;
}

/* Honeypot */
.form__hp {
  position: absolute;
  left: -9999px;
  opacity: 0;
  height: 0;
  width: 0;
  overflow: hidden;
}

.form__submit {
  align-self: flex-start;
  margin-top: 8px;
}

.form__message {
  padding: 14px 20px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  display: none;
}

.form__message--success {
  display: block;
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.2);
  color: var(--color-success);
}

.form__message--error {
  display: block;
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.2);
  color: var(--color-error);
}

/* --- Footer --- */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer__copy {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.footer__links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.footer__link {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  transition: color var(--transition-base);
}

.footer__link:hover {
  color: var(--color-text-secondary);
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* Hero animations */
.hero__badge { animation: fadeUp 0.6s ease-out 0.2s both; }
.hero__title { animation: fadeUp 0.6s ease-out 0.35s both; }
.hero__subtitle { animation: fadeUp 0.6s ease-out 0.5s both; }
.hero__actions { animation: fadeUp 0.6s ease-out 0.65s both; }

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Divider --- */
.section__divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .about__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .products__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .why__grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .why__visual {
    order: -1;
  }

  .why__graphic {
    max-width: 360px;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  .section {
    padding: 80px 0;
  }

  .section__header {
    margin-bottom: 48px;
  }

  .nav__links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 80px 32px 32px;
    background: var(--color-bg-secondary);
    border-left: 1px solid var(--color-border);
    transition: right var(--transition-base);
    z-index: 999;
  }

  .nav__links.open {
    right: 0;
  }

  .nav__link {
    font-size: 1rem;
    padding: 12px 0;
    width: 100%;
    border-bottom: 1px solid var(--color-border);
  }

  .nav__cta {
    margin-top: 16px;
  }

  .nav__toggle {
    display: flex;
    z-index: 1001;
  }

  .nav__toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .nav__toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .nav__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .nav__overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
  }

  .nav__overlay.active {
    display: block;
  }

  .about__grid {
    grid-template-columns: 1fr;
  }

  .products__grid {
    grid-template-columns: 1fr;
  }

  .form__row {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding: 140px 24px 80px;
  }

  .product-card {
    padding: 32px 28px;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .form__submit {
    align-self: stretch;
  }
}